<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="isAll" /> <span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(item, index) in goodList" :key="index">
          <th><input type="checkbox" v-model="item.checked" /></th>
          <th>{{ item.name }}</th>
          <th>{{ item.price }}</th>
          <th>
            <button
              :disabled="item.num <= 0 ? true : false"
              @click="subtract(index)"
            >
              -</button
            >{{ item.num }} <button @click="addNum(index)">+</button>
          </th>
          <th>{{ item.price * item.num }}</th>
          <th><button @click="delLIst(index)">删除</button></th>
        </tr>
      </tbody>
      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5">{{ total }}</td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import { mapState, mapMutations, mapGetters } from "vuex";
export default {
  data() {
    return {};
  },
  computed: {
    ...mapState(["goodList"]),
    ...mapGetters(["total"]),
    isAll: {
      set(value) {
        this.changeAll(value);
      },
      get() {
        return this.goodList.every((item) => item.checked);
      },
    },
  },
  methods: {
    ...mapMutations(["sum", "minus", "remove", "changeAll"]),
    subtract(index) {
      this.minus(index);
    },
    addNum(index) {
      this.sum(index);
    },
    delLIst(index) {
      this.remove(index);
    },
  },
};
</script>

<style>
</style>